Brake built-in type rotating table and braking control method thereof

Abstract

Provided are a brake built-in type rotating table and a braking control method thereof. The brake built-in type rotating table comprises a shell body, a rotary part and a hydraulic braking assembly are mounted in the shell body, and the hydraulic braking assembly is fixed to the right side of the shell body; the rotary part comprises rotors fixed into stators of a torque motor, and a braking shaft is coaxially fixed in the rotors; the hydraulic braking assembly is arranged on the periphery of the braking shaft in a sleeving mode, and comprises a piston, an internally-expanding type brake expansion sleeve and a hydraulic cylinder body, the piston is arranged in the hydraulic cylinder body, and hydraulic sealing is conducted between the piston and the hydraulic cylinder body through a sealing ring; the internally-expanding type braking expansion sleeve is fixed to the hydraulic cylinder body and arranged between the braking shaft and the hydraulic cylinder body, and a braking oil line leading into the right side of the piston and an unloading oil line leading into the left side of the piston are formed in the hydraulic cylinder body; and the braking oil line and the unloading oil line communicate with a oil guide pipe of an external control oil tank correspondingly, the external control oil tank controls the piston to move in the axial direction in the hydraulic cylinder body, when the piston move leftwards in the axial direction, the internally-expanding braking expansion sleeve is pressed tightly on the braking shaft.

Description

technical field [0001] The invention relates to a built-in brake rotary worktable and a brake control method thereof, belonging to the field of machine tool accessories. Background technique [0002] The rotary table is the core component of various machine tools such as vertical lathes, milling machines, machining centers, and CNC gear shaping machines. [0003] The movement accuracy, bearing capacity, and ability to deal with impact of the rotary table are related to the production and processing capacity and efficiency of the entire machine tool. In order to improve the accuracy, the existing rotary table generally uses a torque motor drive mechanism with a reduction device. Drive the rotary table to rotate, and the rotary table directly driven by the torque motor, when receiving the stop command, the dynamic brake circuit brakes the motor, and its self-locking force is small, especially when it is stopped at a small angle. Over-rotation, so a set of braking mechanism ...

AI Technical Summary

Problems solved by technology

[0008] In the above prior art, the braking mechanism presses the rotating shaft through hydraulic pressure or elastic force to generate braking torque and realize the braking function, but the braking reliability and stability of the braking mechanism need to be improved, and it is assembled with the rotating parts The rationality of the structure still needs to be improved

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